unidok-parser 0.2.0

Parser for the Unidok document format
Documentation 
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use aho_corasick::AhoCorasick;
use unidok_repr::ast::html::HtmlNodeAst;
use unidok_repr::ast::macros::InlineMacroAst;
use unidok_repr::ast::segments::SegmentAst;

use crate::html::elem::ParseHtmlElem;
use crate::inlines::braces::ParseBraces;
use crate::inlines::code::ParseCode;
use crate::inlines::images::ParseImage;
use crate::inlines::links::ParseLink;
use crate::inlines::math::ParseMath;
use crate::parsing_mode::ParsingMode;
use crate::{Indents, Input, Parse};

use super::args::ParseMacroArgs;
use super::utils::{get_parsing_mode, ParseMacroName};

pub(crate) struct ParseInlineMacro<'a> {
    pub ind: Indents<'a>,
    pub mode: Option<ParsingMode>,
    pub ac: &'a AhoCorasick,
}

impl Parse for ParseInlineMacro<'_> {
    type Output = InlineMacroAst;

    fn parse(&mut self, input: &mut Input) -> Option<Self::Output> {
        let mut input = input.start();
        let ac = self.ac;
        let ind = self.ind;

        input.parse('@')?;
        let name = input.parse(ParseMacroName)?;
        let name_str = name.to_str(&input.text).to_string();
        let args = input.parse(ParseMacroArgs { name: &name_str, ind, ac })?;

        if name.is_empty() && args.is_none() {
            return None;
        }

        let mode = get_parsing_mode(&name_str, &args, &input)?.or(self.mode);

        let segment = if let Some(braces) = input.parse(ParseBraces { ind, mode, ac }) {
            SegmentAst::Braces(braces)
        } else if let Some(code) = input.parse(ParseCode { ind, mode, ac }) {
            SegmentAst::Code(code)
        } else if let Some(mac) = input.parse(ParseInlineMacro { ind, mode, ac }) {
            SegmentAst::InlineMacro(mac)
        } else if let Some(img) = input.parse(ParseImage { ind, mode, ac }) {
            SegmentAst::Image(img)
        } else if let Some(link) = input.parse(ParseLink { ind, mode, ac }) {
            SegmentAst::Link(link)
        } else if let Some(math) = input.parse(ParseMath { ind }) {
            SegmentAst::Math(math)
        } else if let Some(elem) = input.parse(ParseHtmlElem { ind, mode, ac }) {
            SegmentAst::InlineHtml(HtmlNodeAst::Element(elem))
        } else {
            return None;
        };
        let segment = Box::new(segment);

        input.apply();
        Some(InlineMacroAst { name, args, segment })
    }
}